RRA .308 no break in,no running wet.Only change was trigger SSA-E from RRA 2 stage N.M..While I had no problem with stock trigger,SSA-E was a different animal altogether.And it was on sale.RRA star ambi-select is great selector,but I did put on a BAD selector to support our sponsor and for no other reason.My rifle shoots better than I can.Has a little weight 14.5 lbs. w/full magazineJust my 2 mags.